问如何使用Android对Firestore进行分页？

EN

// Construct query for first 25 cities, ordered by population
Query first = db.collection("cities")
    .orderBy("population")
    .limit(25);

first.get()
    .addOnSuccessListener(new OnSuccessListener<QuerySnapshot>() {
    @Override
    public void onSuccess(QuerySnapshot documentSnapshots) {
        // ...

        // Get the last visible document
        DocumentSnapshot lastVisible = documentSnapshots.getDocuments()
            .get(documentSnapshots.size() -1);

        // Construct a new query starting at this document,
        // get the next 25 cities.
        Query next = db.collection("cities")
            .orderBy("population")
            .startAfter(lastVisible)
            .limit(25);

        // Use the query for pagination
        // ...
    }
});